Filter for household aquarium



FIG. 1 is a perspective view of a filter for a household aquariumembodying my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevational view thereof, the right side being amirror image;

FIG. 6 is a vertical cross-sectional view thereof, taken along line 6--6of FIG. 4;

FIG. 7 is a vertical cross-sectional view taken along line 7--7 of FIG.4;

FIG. 8 is a vertical cross-sectional view thereof, taken along line 8--8of FIG. 4;

FIG. 9 is a bottom plan view thereof; and,

FIG. 10 is a reduced perspective view thereof, the broken-line showingof the aquarium tank and the attachments being for illustrative purposesonly and forming no part of the claimed design.

The ornamental design for a filter for a household aquarium,substantially as shown and described.